1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
2. EMD Performance Materials, Tempe, Arizona 85224, USA
3. Fraunhofer Center for Coatings and Diamond Technologies, Michigan State University, East Lansing, Michigan 48824, USA
4. Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824, USA
5. Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, USA
6. Department of Computational Mathematics, Science and Engineering, Michigan State University, East Lansing, Michigan 48824, USA